GRB 190114C in the nuclear region of an interacting galaxy: A detailed host analysis using ALMA, the HST, and the VLT

A. De Ugarte Postigo; C. C. Thöne; S. Martín; J. Japelj; A. J. Levan; M. J. Michałowski; J. Selsing; D. A. Kann; S. Schulze; J. T. Palmerio; S. D. Vergani; N. R. Tanvir; K. Bensch; S. Covino; V. D'Elia; M. De Pasquale; A. S. Fruchter; J. P.U. Fynbo; D. Hartmann; K. E. Heintz; A. J. Van Der Horst; L. Izzo; P. Jakobsson; K. C.Y. Ng; D. A. Perley; A. Rossi; B. Sbarufatti; R. Salvaterra; R. Sánchez-Ramírez; D. Watson; D. Xu

doi:10.1051/0004-6361/201936668

GRB 190114C in the nuclear region of an interacting galaxy: A detailed host analysis using ALMA, the HST, and the VLT

A. De Ugarte Postigo, C. C. Thöne, S. Martín, J. Japelj, A. J. Levan, M. J. Michałowski, J. Selsing, D. A. Kann, S. Schulze, J. T. Palmerio, S. D. Vergani, N. R. Tanvir, K. Bensch, S. Covino, V. D'Elia, M. De Pasquale, A. S. Fruchter, J. P.U. Fynbo, D. Hartmann, K. E. HeintzA. J. Van Der Horst, L. Izzo, P. Jakobsson, K. C.Y. Ng, D. A. Perley, A. Rossi, B. Sbarufatti, R. Salvaterra, R. Sánchez-Ramírez, D. Watson, D. Xu

Astronomy & Astrophysics

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Context. For the first time, very high energy emission up to the TeV range has been reported for a gamma-ray burst (GRB). It is still unclear whether the environmental properties of GRB 190114C might have contributed to the production of these very high energy photons, or if it is solely related to the released GRB emission. Aims. The relatively low redshift of the GRB (z = 0.425) allows us to study the host galaxy of this event in detail, and to potentially identify idiosyncrasies that could point to progenitor characteristics or environmental properties that might be responsible for this unique event. Methods. We used ultraviolet, optical, infrared, and submillimetre imaging and spectroscopy obtained with the HST, the VLT, and ALMA to obtain an extensive dataset on which the analysis of the host galaxy is based. Results. The host system is composed of a close pair of interacting galaxies (Δv = 50 km s-1), both of which are well detected by ALMA in CO(3-2). The GRB occurred within the nuclear region (∼170 pc from the centre) of the less massive but more star-forming galaxy of the pair. The host is more massive (log(M/M⊙ ) = 9.3) than average GRB hosts at this redshift, and the location of the GRB is rather unique. The higher star formation rate was probably triggered by tidal interactions between the two galaxies. Our ALMA observations indicate that both host galaxy and companion have a high molecular gas fraction, as has been observed before in interacting galaxy pairs. Conclusions. The location of the GRB within the core of an interacting galaxy with an extinguished line of sight is indicative of a denser environment than typically observed for GRBs and could have been crucial for the generation of the very high energy photons that were observed.

Original language	English (US)
Article number	A68
Journal	Astronomy and Astrophysics
Volume	633
DOIs	https://doi.org/10.1051/0004-6361/201936668
State	Published - Jan 1 2020

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1051/0004-6361/201936668

Cite this

De Ugarte Postigo, A., Thöne, C. C., Martín, S., Japelj, J., Levan, A. J., Michałowski, M. J., Selsing, J., Kann, D. A., Schulze, S., Palmerio, J. T., Vergani, S. D., Tanvir, N. R., Bensch, K., Covino, S., D'Elia, V., De Pasquale, M., Fruchter, A. S., Fynbo, J. P. U., Hartmann, D., ... Xu, D. (2020). GRB 190114C in the nuclear region of an interacting galaxy: A detailed host analysis using ALMA, the HST, and the VLT. Astronomy and Astrophysics, 633, Article A68. https://doi.org/10.1051/0004-6361/201936668

@article{f0f5a3d5e1a04a01a1b751a1c9a05e76,

title = "GRB 190114C in the nuclear region of an interacting galaxy: A detailed host analysis using ALMA, the HST, and the VLT",

abstract = "Context. For the first time, very high energy emission up to the TeV range has been reported for a gamma-ray burst (GRB). It is still unclear whether the environmental properties of GRB 190114C might have contributed to the production of these very high energy photons, or if it is solely related to the released GRB emission. Aims. The relatively low redshift of the GRB (z = 0.425) allows us to study the host galaxy of this event in detail, and to potentially identify idiosyncrasies that could point to progenitor characteristics or environmental properties that might be responsible for this unique event. Methods. We used ultraviolet, optical, infrared, and submillimetre imaging and spectroscopy obtained with the HST, the VLT, and ALMA to obtain an extensive dataset on which the analysis of the host galaxy is based. Results. The host system is composed of a close pair of interacting galaxies (Δv = 50 km s-1), both of which are well detected by ALMA in CO(3-2). The GRB occurred within the nuclear region (∼170 pc from the centre) of the less massive but more star-forming galaxy of the pair. The host is more massive (log(M/M⊙ ) = 9.3) than average GRB hosts at this redshift, and the location of the GRB is rather unique. The higher star formation rate was probably triggered by tidal interactions between the two galaxies. Our ALMA observations indicate that both host galaxy and companion have a high molecular gas fraction, as has been observed before in interacting galaxy pairs. Conclusions. The location of the GRB within the core of an interacting galaxy with an extinguished line of sight is indicative of a denser environment than typically observed for GRBs and could have been crucial for the generation of the very high energy photons that were observed.",

author = "{De Ugarte Postigo}, A. and Th{\"o}ne, {C. C.} and S. Mart{\'i}n and J. Japelj and Levan, {A. J.} and Micha{\l}owski, {M. J.} and J. Selsing and Kann, {D. A.} and S. Schulze and Palmerio, {J. T.} and Vergani, {S. D.} and Tanvir, {N. R.} and K. Bensch and S. Covino and V. D'Elia and {De Pasquale}, M. and Fruchter, {A. S.} and Fynbo, {J. P.U.} and D. Hartmann and Heintz, {K. E.} and {Van Der Horst}, {A. J.} and L. Izzo and P. Jakobsson and Ng, {K. C.Y.} and Perley, {D. A.} and A. Rossi and B. Sbarufatti and R. Salvaterra and R. S{\'a}nchez-Ram{\'i}rez and D. Watson and D. Xu",

note = "Publisher Copyright: {\textcopyright} ESO 2020.",

year = "2020",

month = jan,

day = "1",

doi = "10.1051/0004-6361/201936668",

language = "English (US)",

volume = "633",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

De Ugarte Postigo, A, Thöne, CC, Martín, S, Japelj, J, Levan, AJ, Michałowski, MJ, Selsing, J, Kann, DA, Schulze, S, Palmerio, JT, Vergani, SD, Tanvir, NR, Bensch, K, Covino, S, D'Elia, V, De Pasquale, M, Fruchter, AS, Fynbo, JPU, Hartmann, D, Heintz, KE, Van Der Horst, AJ, Izzo, L, Jakobsson, P, Ng, KCY, Perley, DA, Rossi, A, Sbarufatti, B, Salvaterra, R, Sánchez-Ramírez, R, Watson, D & Xu, D 2020, 'GRB 190114C in the nuclear region of an interacting galaxy: A detailed host analysis using ALMA, the HST, and the VLT', Astronomy and Astrophysics, vol. 633, A68. https://doi.org/10.1051/0004-6361/201936668

TY - JOUR

T1 - GRB 190114C in the nuclear region of an interacting galaxy

T2 - A detailed host analysis using ALMA, the HST, and the VLT

AU - De Ugarte Postigo, A.

AU - Thöne, C. C.

AU - Martín, S.

AU - Japelj, J.

AU - Levan, A. J.

AU - Michałowski, M. J.

AU - Selsing, J.

AU - Kann, D. A.

AU - Schulze, S.

AU - Palmerio, J. T.

AU - Vergani, S. D.

AU - Tanvir, N. R.

AU - Bensch, K.

AU - Covino, S.

AU - D'Elia, V.

AU - De Pasquale, M.

AU - Fruchter, A. S.

AU - Fynbo, J. P.U.

AU - Hartmann, D.

AU - Heintz, K. E.

AU - Van Der Horst, A. J.

AU - Izzo, L.

AU - Jakobsson, P.

AU - Ng, K. C.Y.

AU - Perley, D. A.

AU - Rossi, A.

AU - Sbarufatti, B.

AU - Salvaterra, R.

AU - Sánchez-Ramírez, R.

AU - Watson, D.

AU - Xu, D.

PY - 2020/1/1

Y1 - 2020/1/1

N2 - Context. For the first time, very high energy emission up to the TeV range has been reported for a gamma-ray burst (GRB). It is still unclear whether the environmental properties of GRB 190114C might have contributed to the production of these very high energy photons, or if it is solely related to the released GRB emission. Aims. The relatively low redshift of the GRB (z = 0.425) allows us to study the host galaxy of this event in detail, and to potentially identify idiosyncrasies that could point to progenitor characteristics or environmental properties that might be responsible for this unique event. Methods. We used ultraviolet, optical, infrared, and submillimetre imaging and spectroscopy obtained with the HST, the VLT, and ALMA to obtain an extensive dataset on which the analysis of the host galaxy is based. Results. The host system is composed of a close pair of interacting galaxies (Δv = 50 km s-1), both of which are well detected by ALMA in CO(3-2). The GRB occurred within the nuclear region (∼170 pc from the centre) of the less massive but more star-forming galaxy of the pair. The host is more massive (log(M/M⊙ ) = 9.3) than average GRB hosts at this redshift, and the location of the GRB is rather unique. The higher star formation rate was probably triggered by tidal interactions between the two galaxies. Our ALMA observations indicate that both host galaxy and companion have a high molecular gas fraction, as has been observed before in interacting galaxy pairs. Conclusions. The location of the GRB within the core of an interacting galaxy with an extinguished line of sight is indicative of a denser environment than typically observed for GRBs and could have been crucial for the generation of the very high energy photons that were observed.

AB - Context. For the first time, very high energy emission up to the TeV range has been reported for a gamma-ray burst (GRB). It is still unclear whether the environmental properties of GRB 190114C might have contributed to the production of these very high energy photons, or if it is solely related to the released GRB emission. Aims. The relatively low redshift of the GRB (z = 0.425) allows us to study the host galaxy of this event in detail, and to potentially identify idiosyncrasies that could point to progenitor characteristics or environmental properties that might be responsible for this unique event. Methods. We used ultraviolet, optical, infrared, and submillimetre imaging and spectroscopy obtained with the HST, the VLT, and ALMA to obtain an extensive dataset on which the analysis of the host galaxy is based. Results. The host system is composed of a close pair of interacting galaxies (Δv = 50 km s-1), both of which are well detected by ALMA in CO(3-2). The GRB occurred within the nuclear region (∼170 pc from the centre) of the less massive but more star-forming galaxy of the pair. The host is more massive (log(M/M⊙ ) = 9.3) than average GRB hosts at this redshift, and the location of the GRB is rather unique. The higher star formation rate was probably triggered by tidal interactions between the two galaxies. Our ALMA observations indicate that both host galaxy and companion have a high molecular gas fraction, as has been observed before in interacting galaxy pairs. Conclusions. The location of the GRB within the core of an interacting galaxy with an extinguished line of sight is indicative of a denser environment than typically observed for GRBs and could have been crucial for the generation of the very high energy photons that were observed.

UR - http://www.scopus.com/inward/record.url?scp=85084311667&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85084311667&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201936668

DO - 10.1051/0004-6361/201936668

M3 - Article

AN - SCOPUS:85084311667

SN - 0004-6361

VL - 633

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A68

ER -

GRB 190114C in the nuclear region of an interacting galaxy: A detailed host analysis using ALMA, the HST, and the VLT

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this